Unhappy customer

I went to the store ackermans to buy school the tag on the shoes was r279 but the one on the floor one of the shoes didn't have the lace the lady went to the stock room to get me another pair when the assistance came back she told me the shoes are r309 or more then i told them i want the shoes with the same price the supervisor by the name of Patricia i was not happy because they refuse to give me the price that was on the price tag crests ackermans did follow the CPA policy or. Rules im very disappointed with the store